/Engine/Source/Runtime/Engine/Classes/Engine/Engine.h
Find a Local Player Controller, which may not exist at all if this is a server.
first found LocalPlayerController. Fine for single player, in split screen, one will be picked.
[APlayerController](API\Runtime\Engine\GameFramework\APlayerController) * GetFirstLocalPlayerController ( const [UWorld](API\Runtime\Engine\Engine\UWorld) * InWorld )